IfcStructuralItem

Definition from buildingSMART: The abstract entity IfcStructuralItem covers structural members and structural connections. It defines the relation needed to associate structural actions to structural members and connections.

Topology Use Definition

Instances of IfcStructuralItem shall have a topology representation. It includes a placement and a product representation. The IfcProductRepresentation shall be given by an item of Representations being of type "IfcTopologyRepresentation".

Local Placement

All IfcStructuralItems which are grouped within a common IfcStructuralAnalysisModel should have equal object placements. Placement within the world coordinate system of the project is the easiest way to ensure this, especially if structural items belong to more than one analysis model.

All geometric entities within the topological representation (such as IfcVertexPoint, IfcEdgeCurve, or IfcFaceSurface) are founded in the object coordinate system established by ObjectPlacement.

HISTORY: New entity in Release IFC2x Edition 2.

EXPRESS specification:

ENTITY IfcStructuralItem

ABSTRACT SUPERTYPE OF

(ONEOF(IfcStructuralMember, IfcStructuralConnection))

SUBTYPE OF (

IfcProduct);

INVERSE

AssignedStructuralActivity

SET OF IfcRelConnectsStructuralActivity FOR RelatingElement;

END_ENTITY;

Attribute definitions:

AssignedStructuralActivity

Inverse relationship to all structural activities (i.e. to actions or reactions) which are assigned to this structural member.

Inheritance graph

ENTITY IfcStructuralItem;

ENTITY IfcRoot;

GlobalId

IfcGloballyUniqueId;

OwnerHistory

IfcOwnerHistory;

Name

OPTIONAL IfcLabel;

Description

OPTIONAL IfcText;

ENTITY IfcObjectDefinition;

INVERSE

HasAssignments

SET OF IfcRelAssigns FOR RelatedObjects;

IsDecomposedBy

SET OF IfcRelDecomposes FOR RelatingObject;

Decomposes

SET [0:1] OF IfcRelDecomposes FOR RelatedObjects;

HasAssociations

SET OF IfcRelAssociates FOR RelatedObjects;

ENTITY IfcObject;

ObjectType

OPTIONAL IfcLabel;

INVERSE

IsDefinedBy

SET OF IfcRelDefines FOR RelatedObjects;

ENTITY IfcProduct;

ObjectPlacement

OPTIONAL IfcObjectPlacement;

Representation

OPTIONAL IfcProductRepresentation;

INVERSE

ReferencedBy

SET OF IfcRelAssignsToProduct FOR RelatingProduct;

ENTITY IfcStructuralItem;

INVERSE

AssignedStructuralActivity

SET OF IfcRelConnectsStructuralActivity FOR RelatingElement;

END_ENTITY;